Abstract
Two differenct sources of errors may occur in the implementation
of the PE methods; a phase error introduced in the approximation
of a pseudo-differential operator and an amplitude error generated
from the starting field. First, the inherent phase errors
introduced in the solution are analyzed for a case where the
normal mode solution to the wave equation is valid, when the sound
is propagated in a downward refracting atmosphere. The angular
limitations for the different parabolic approximations are
deduced, and calculations showing shifts in the starter as the
second source of error is investigated. Numerical and analytical
starters are compared for source locations close to the ground.
The spectral properties of several starters are presented.
| Original language | English |
|---|---|
| Title of host publication | Seventh International Symposium on Long Range Sound Propagation |
| Place of Publication | Ecully |
| Publisher | Laboratoire de Mécanique des Fluides et d'Acoustique, Ecole Centrale de Lyon |
| Publication date | 1996 |
| Pages | 235-255 |
| Publication status | Published - 1996 |
| Event | 7th International Symposium on Long Range Sound Propagation - Lyon, France Duration: 24 Jul 1996 → 26 Jul 1996 Conference number: 7 |
Conference
| Conference | 7th International Symposium on Long Range Sound Propagation |
|---|---|
| Number | 7 |
| Country/Territory | France |
| City | Lyon |
| Period | 24/07/1996 → 26/07/1996 |